APPLICATIONS

—  

Air heaters

  

Incinerators

   

Process heaters

   

Rotary processes

   

Spray Dryers

—  

Calcining

  Lower temperature solutions where secondary air is 

     normally employed to achieve process temperatures 
     between 300-1600°F

Bulletin 4213

Page 2

Patented technology, robust design

FEATURES and BENEFITS

—  

Patented lean premix technology

—  

Low NOx and CO emissions without the use of FGR

—  

NOx emissions of less than 10ppm in many applications

—  

High turndown capability

—  

Low fan horsepower requirement

—  

Robust, proven, reliable burner design. Successful installations over 25 years.

—  

The majority of the combustion is completed in the companion reaction chamber, 

     minimizing process infl uences on NOx emissions.

—  

Compact fl ame geometry allows signifi cant reductions in fl ame protection tube and

     furnace size resulting in a lower installed cost of LEx systems.

—  

Main (Primary) combustion air can be heated up to 700°F for increased effi

  ciency. 

     (Ambient air required for radial air supply).

OPERATION

—  

Combustion air supply is split between main (primary) air and radial air connections on larger burner sizes.

  Fuel gas is split between primary gas and radial gas connections.

  Radial gas is used at start-up and for stabilization of the primary (lean) core.

  Primary gas feeds internal mixers to create a lean primary zone, typically operated at 60-70% excess air.

  Main air pressure: 10-15 in. w.g.

  Gas pressure: 8 PSIG

  Minimum primary air pressure required for continuous operation: 0.75 in.w.g.

  Preset air-to-gas ratio turndown of greater than 4:1, with appropriately designed combustion system.

  Thermal turndowns of 20:1 are also possible in most applications

MAIN COMBUSTION AIR INLET

RADIAL AIR INLET

RADIAL GAS INLET

PRIMARY GAS 

INLET

ANTI-FLASHBACK 

MIXERS

PRIMARY REACTION 

ZONE

POC RECIRCULATION

POC RECIRCULATION

4213 Emissions Data

Burner Rated for 15.5 MMBTU/h HHV

25

20

15

10

5

0

40    45     50     55     60     65     70      75     80

Excess Air %

NOx (ppm cor

rect

ed t

o 3% 0

2

)

Catalog Combustion 2021 - Page 0146

Fives Group
FIVES GROUP
FIVES GROUP-FIVES GROUP-0146-0150

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